212011100021001 has 4 divisors (see below), whose sum is σ = 282681466694672. Its totient is φ = 141340733347332.

The previous prime is 212011100020991. The next prime is 212011100021041. The reversal of 212011100021001 is 100120001110212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212011100021001 - 2⁵ = 212011100020969 is a prime.

It is a super-2 number, since 2×212011100021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212011100021041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35335183336831 + ... + 35335183336836.

It is an arithmetic number, because the mean of its divisors is an integer number (70670366673668).

Almost surely, 2^{212011100021001} is an apocalyptic number.

It is an amenable number.

212011100021001 is a deficient number, since it is larger than the sum of its proper divisors (70670366673671).

212011100021001 is an equidigital number, since it uses as much as digits as its factorization.

212011100021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70670366673670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 212011100021001 its reverse (100120001110212), we get a palindrome (312131101131213).

The spelling of 212011100021001 in words is "two hundred twelve trillion, eleven billion, one hundred million, twenty-one thousand, one".